# ULTRAKILL Patch 17d Changelog

- Product: ULTRAKILL (https://whatsnew.fyi/product/ultrakill)
- Vendor: Arsi "Hakita" Patala
- Date: 2026-04-15
- Original notes: https://store.steampowered.com/news/app/1229490/view/512988720771629406
- Permalink: https://whatsnew.fyi/product/ultrakill/releases/2026-04-15-patch-17d-changelog

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

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- **changed** — Improved optimization on non-portal levels and the Cyber Grind
- **changed** — Made the Friends leaderboard at the end of a Cyber Grind run scrollable
- **changed** — The 75% wave completion requirement for opening Deathcatcher cages now excludes the Deathcatchers themselves
- **fixed** — If a Deathcatcher cage spawns on top of the player in the Cyber Grind, the player is now teleported above it instead of getting stuck inside
- **fixed** — Fixed enemies sometimes not dying when falling from a fatal height
- **fixed** — Fixed a broken navmesh in 2-2's first area causing a group of Soldiers to spawn in the wrong location
- **fixed** — Fixed the Sawed-On Shotgun's chainsaw appearing broken after respawning if it was broken before being launched
- **fixed** — Fixed the Sawed-On Shotgun not being able to use primary fire while chainsaw meleeing
- **fixed** — Fixed the Earthmover boss health bar replaying its intro fill animation when the player grabs a checkpoint
- **fixed** — Fixed some enemies not rendering correctly in the 8-3 Dimensional Deathcatcher room
- **fixed** — Fixed Major Assist game speed change not applying correctly after a level load
- **fixed** — Fixed a small unintended crevice in 8-2 Reception
- **fixed** — Fixed the right wall being offset by one unit in 8-3 Shifting Arena
- **changed** — Made Wind state breaking breakables and glass more consistent
- **fixed** — Fixed a mysterious black blob sometimes appearing on the portal from 8-3 Split Color Door to Night Street
- **changed** — Ejected cores are no longer launched by non-Knuckleblaster explosions
- **fixed** — Fixed Malicious Face beams not causing core ejects to nuke
- **added** — Added a buffer safety system to the alt fires of the Core Eject Shotgun and SRS Cannon Rocket Launcher to avoid firing a 0 force projectile when switching to the weapon
- **fixed** — Fixed Mannequins inheriting a broken version of the Husk chest explosion mechanic
- **fixed** — Fixed the electricity particles of the Electric Railcannon and Malicious Railcannon not displaying correctly

-  Improved optimization on non-portal levels and the Cyber Grind

-  Made the Friends leaderboard at the end of a Cyber Grind run scrollable

-  The 75% wave completion requirement for opening Deathcatcher cages now excludes the Deathcatchers themselves, reducing the amount of other enemies the player has to hunt down to open them

-  If a Deathcatcher cage spawns on top of the player in the Cyber Grind, the player will now be teleported above it instead of getting stuck inside

-  Fixed enemies sometimes not dying when falling from a fatal height

-  Fixed a broken navmesh in 2-2's first area causing a group of Soldiers to spawn in the wrong location

-  Fixed a bug that caused the Sawed-On Shotgun's chainsaw to still appear broken after respawning if it was broken before being launched

-  Fixed a bug that caused the Sawed-On Shotgun to no longer be able to use the primary fire while chainsaw meleeing

-  Fixed the Earthmover boss health bar replaying its intro fill animation when the player grabs a checkpoint

-  Fixed some enemies not rendering correctly in the 8-3 Dimensional Deathcatcher room

-  Major Assist game speed change now applies correctly after a level load instead of only after a time stop has triggered

-  Fixed a small unintended crevice in 8-2 Reception

-  Fixed the right wall being offset by one unit in 8-3 Shifting Arena

-  Made Wind state breaking breakables and glass more consistent

-  Fixed a mysterious black blob sometimes appearing on the portal leading from 8-3 Split Color Door to Night Street

-  Ejected cores are no longer launched by non-Knuckleblaster explosions

-  Fixed Malicious Face beams not causing core ejects to nuke

-  Added a buffer safety system to the alt fires of the Core Eject Shotgun and SRS Cannon Rocket Launcher to avoid the player accidentally firing a 0 force projectile when switching to the weapon

-  Fixed a bug that caused Mannequins to inherit a broken version of the Husk chest explosion mechanic

-  Fixed the electricity particles of the Electric Railcannon and Malicious Railcannon not displaying correctly

-  Fixed the Railcannon pips not working correctly sometimes when using a Dual Wield powerup

-  Fixed a bug that caused a Power's health bar to appear for a single frame at the beginning of his spawn animation in 8-3

-  Coins no longer break if hit by multiple beams in quick succession

-  Made the Mirror Reaper's non-boss spawn sound louder

-  Fixed a bug that caused Size 2 fish to be uncatchable